IOS开发（84）之移动图形

1 前言

使用 CGAffineTransformMakeTranslation 函数创建一个仿射位移变换(affine translation transformation)。将被绘制到图形环境上的一切,到一个新的位置,而不需要修改你的绘图代码。

2 代码实例

ZYViewControllerView.m

- (void)drawRect:(CGRect)rect{
    CGMutablePathRef path = CGPathCreateMutable();
    CGRect rectangle = CGRectMake(10.0f, 10.0f, 200.0f,
                                  300.0f);
    //将矩形向右移动100而纵向不变
    CGAffineTransform transform = CGAffineTransformMakeTranslation(100.0f, 0.0f);
    /* Add the rectangle to the path */
    CGPathAddRect(path,&transform, rectangle);
    /* Get the handle to the current context */
    CGContextRef currentContext = UIGraphicsGetCurrentContext();
    /* Add the path to the context */
    CGContextAddPath(currentContext,path);
    /* Set the fill color to cornflower blue */
    [[UIColor colorWithRed:0.20f green:0.60f blue:0.80f alpha:1.0f] setFill];
    /* Set the stroke color to brown */
    [[UIColor brownColor] setStroke];
    /* Set the line width (for the stroke) to 5 */
    CGContextSetLineWidth(currentContext,5.0f);
    /* Stroke and fill the path on the context */
    CGContextDrawPath(currentContext,kCGPathFillStroke);
    /* Dispose of the path */
    CGPathRelease(path);
}

运行结果

3 结语

以上是所有内容，希望对大家有所帮助。

Demo代码下载：http://download.youkuaiyun.com/detail/u010013695/5379043